LilyPond sheet music text editor
Emulator of x86-based machines based on PCem
Karaoke for Windows
Your Hardcore Loop Machine.
A lightweight audio-to-MIDI converter with pitch bend detection
Mixxx is Free DJ software that gives you everything you need
Pattern language
Multiplatform MIDI File Player for Linux, Windows, and macOS
Arduino library to play MOD, WAV, FLAC, MIDI, RTTTL, MP3
RPG Maker 2000/2003 and EasyRPG games interpreter
Virtual MIDI controller for Linux, Windows and OSX
Midi router
Very simple MIDI Player of JSON files
An advanced drum machine with pattern-based programming
Graphical editor software for many Boss and Roland effect & synth unit
Virtual Pipe Organ Software
EasyABC is an open source ABC editor
A cross-platform port of Hexen II game.